Accession Number:

ADA023887

Title:

Interim Tests of the Effects of Long Duration Blast-Type FLows on Fires in Urban Interiors and Contents of Emergency Operating Centers (EOC)

Descriptive Note:

Final rept. Nov 1974-Oct 1975

Corporate Author:

URS RESEARCH CO SAN MATEO CA

Personal Author(s):

Report Date:

1976-01-01

Pagination or Media Count:

272.0

Abstract:

This studys objectives were to extend understanding of how long- duration air blast from megaton weapons interacts with fires ignited by the thermal pulse. It was postulated earlier that extinguishment would occur, for many materials, when subjected to such long-duration flows. Tests were designed and conducted in the URS Long Duration Flow Facility at Fort Cronkhite, Calif. Burning materials were placed in a room approximately 12 x 15 x 8.5 and subjected to pressures of 1.0 to 3.5 psi, flows of 200 to 600 ftsec and attendant flow durations of 1 to 2 sec. Materials tested included, but were not limited to, paper solid-pack and crumpled, cloth, vinyl, cardboard, and wood. In addition, two testswithout fire of a simulated EOC without blastdoors were performed at 2 psi. Results indicated that 2 psi rather than 2.5 psi predicted is a boundary for extinguishment of lighter materials, such as paper and cardboard. Those materials which readily support smouldering combustion, such as cotton batting and heavy cloth, do not extinguish even at 3.5 psi. EOC test results indicated potentially severe damage to communications equipment, monitoring equipment, and furniture.

Subject Categories:

  • Civil Defense

Distribution Statement:

APPROVED FOR PUBLIC RELEASE